 /*******************************************************************************
  * Copyright (c) 2006, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.databinding.observable.tree;

 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;

 /**
  * A context sensitive viewer update request.
  *
  * @since 3.3
  */
 public interface IViewerUpdate extends IProgressMonitor {

     /**
      * Sets the status of this request, possibly <code>null</code>.
      * When a request fails, the status indicates why the request failed.
      * A <code>null</code> status is considered to be successful.
      *
      * @param status request status
      */
     public void setStatus(IStatus status);
     
     /**
      * Returns the status of this request, or <code>null</code>.
      *
      * @return request status or <code>null</code>
      */
     public IStatus getStatus();
     
     /**
      * Returns the model element corresponding to the given tree path.
      * Returns the root element for the empty path.
      *
      * @param path viewer tree path
      * @return corresponding model element
      */
     public Object getElement(TreePath path);
 }

